The reason why a famous book can be told through the ages is that it can highly summarize the feelings and experiences of people and future generations in the same situation. Such is the hope of spring.
National mourning is the sorrow of several generations, and mountains and rivers are eternal existence; When the city is broken in spring, the vegetation will still grow, and the laws of nature will not change because of the changes of the times. The contrast between the current personnel and the eternal time and space makes the poet feel the inner desolation more strongly, so that all he sees are mountains and rivers, vegetation and nothing.
However, although the mountains and rivers are ruthless, even if the poet has turned them into sentient beings, flowers and birds will cry from time to time because of love and be sad because of hate. It shows that human suffering will also disturb nature. Flowers bloom and flowers fall, birds sing and flowers smell, which is just a natural phenomenon, but the heart stunned by tears really comes from the poet.
Therefore, the tears and heart-pounding of flowers and birds are only human empathy. The poet has always been praised for his novel technique of empathy with the scenery, but it is because of the profound implication of the first two sentences that he can touch people's hearts.
In spring and March, there are endless wars, so there are few letters from home, but they are valuable. In the first month of this year, Li Guangbi was at war with Shi Siming in Taiyuan, Guo Ziyi attacked Hedong, and the rebel An Shouzhong sent troops from Chang 'an to Wudu. Chang 'an and Zhangzhou are involved in the war, so it is naturally difficult to get through.
This sentence is actually about my isolation from my family, but it also summarizes a common truth: the news of the safety of my loved ones in the war is more precious than anything else. Because personal feelings can be refined into human nature, these two sentences have become idioms to express people's hope for a letter from home in chaos.